Weft detector in regularly-moving transferrers



Dem 7,1926. 1,609,537

A. J. CHEVRETTE WEFT DETECTOR IN REGULARLY MOVING TRANSFERRERS Filed July 2, 1926 2 Sheets-Sheet 1 Dec. 7 1926.

-' A. J. CHEVRETTE WEFT DETECTOR IN REGULARLY MOVING TRANSFERRERS Filed July 2, 19.26 2 Sheets-Sheet 2 imunm\munmiilllllllllli Patented Dec. 7, 1926.

warren stares Parana" -OFF'l-CE.

AUG-USTIN J. CHEVRETTE, OF VTORCESTER, IKEASSACL'EUSETTS, ASSIG-NOR TO CROMPTON &. KNOWLES LOOM WORKS, 013 VJOROESTER, MASSACE'USETTS, A CORPORATION OF MASSACHUSETTS.

WEFT DETECTOR IN REGULARLY-MOVING TRANSFEEREBS.

Application filed July 2, 1926.

This invention relates to improvements in weft detectors for looms and it 1s the principal object of the invention. to provide a weft detector located in a regularly moving transferrer and dependent for its operative movement upon the inertia of a freely movable part mounted on the transferrer-and moved downwardly therewith on the detecting beat of the loom. The invention relates more particularly to the type of weft detector set forth in patent to Ryon No. 1,372,316. That patent shows a transferrer arm for the magazine receiving a downward movement on detecting beats-of the loom and having mounted thereon a weft detector which is presented to the top of the bobbin. Motion for detectors of this type has usually been derived from a relatively fixed stop which engages a P01? tion of the detector to move the same toward the bobbin. I find that the lever. on which the detector is mounted tends to continue in its downward motion after the transferrer has been arrested due to the inertia thereof and I employ this feature of the device more especially in conjunction with a so-called double contact feeler having yarn penetrating and yarn impinging detectors.

It is a further object of my invention to provide a detector having two parts one of which is mounted for angular motion and is provided with a weight which acts when the transferrer comes to rest to give the detector an angular motion independent of contact with an outside or relatively stationary device.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims. f

In the accompanying drawings wherein I have shown a convenient embodiment of my invention, i

Fig. 1 is a side elevation, parts being in section, of the operating connections between the bottom shaft of the loom and the regularlymoving transferrer,

Fig. 2 is a central section taken parallel to the axis of the shuttle through that part of the transferror arm which lies over the bobbin, and showing the parts in normal position before engagement with the weft pp y,

Serial No. 120,208.

Fig. 3 is a view similar to Fig. 2 with the detector in contact with a suflicient supply of weft, r

Fig. 4: is a view similar to Fig.2 but with the detector in contact with an insuiiicient supplyof weft and moved to indicating position, and

Figs. 5 and 6 are vertical sections on lines 5-5 and 6- 6, respectively, of Fig. 2.

Referring more particularly to Fig. 1 it will be seen that I have provided a loomside 10 having a lay 11 with a shuttle S and a breast beam 12. A magazine M is mounted on the breast beam and isfprovided with a stud 13 on which is pivoted atransferrer arm 14. The latter is connected as at 15 to a vertical rod v16 the lower end of which is connected to a rocking lever 17 mounted on a fixed pivot 18. The rear end of the lever is provided with a roll 19 received by groove 20 of a cam 21 which is secured in any approved manner to the bottom shaft 22. The cam makes a complete revolution every second pick of the loom and'is efi'ective to give the transferrer arm 14 a downward motion when the lay 11 is in its foremost position on alternate or detecting beats of the loom. The matter thus far described is substantially the same as set forth in the aforesaid patent to Ryon.

The transferrer arm is formed more particularly as shown in Figs. 2 to 6 and has slidably mounted'therein a plunger 23 having a shoulder to receive the thrust of a compression spring 24 surroundmg a portion ofthe plunger and bearing agalnst a web 25 extending across a vertical slot 26 inthe transferrer arm. Said plunger is provided with a head 27 and a notch 28 which cooperates with a latch 29 pivoted as at 30 to the transferrer arm and held in plunger holding position by a spring 31. The plunger will ordinarily be in the position indicated in Fig. 2, the spring 24 being held under compression by the latch 29. At the time of indication a depending arm 32 of the latch will be moved to the right and the plunger released, whereupon the spring 24 will move the plunger outwardly to the position indicated in Fig. 1 to cooperate with mechanism not shown but fully set forth in the aforesaid patent. The plunger and controlling latch therefor may be substantially the same as the corresponding parts set forth in pendtill ing application Ser. .No. 78,181 filed by Hume.

My invention relates more particularly to the detecting element which controls the latch 29 and in carrying out my invention I provide a lever l0 pivoted as at ll to the transterrer arm and having a horn '12 to receive one end or? a tension spring t3 the other end 0t which is secured to some fixed part of the trans'terrer arm as screw it. A. finger 4:5 extends to the right of the pivot +11 an d engages a portion of the transterrer arm to limit upward movement of the lever as indicated in Fig. 2.

The detecting elements are mounted on the lever 4-0 and include a yarn penetrating detector 46 held to the lever 40 in adjusted vertical position by means of screw 4-? and having a lower yarn penetrating part The angularly movable yarn impinging detector at?) comprises a body pivoted as at to the lever 40 and has a boss in which the detector 49 is secured. Said detector is formed of a bent wire having two spaced legs each bent to have a substantially horizontal portion toothed or notched to resist sliding movement on the yarm said legs being joined together as at to insure proper alignment of the detector. The detector 4G lies between the toothed sections and normally projects slightly below the teeth. The body 50 has a weight extending to the left of the pivot 51 and said weight is held normally in raised position as indicated in 2 and 3 by a comparatively light spring 56 attached at one end to a lug 57 on the lever lO and at the other end to an extension 58 on the body 50; A set screw 59 limits action of the spring 56 and positions the yarn impinging detector lf).

Under normal conditions the shaft. 22 rotates regularly to give the transferrer arm let a quick downward motion every second pick of the loom when the shuttle is in de tecting position. As the transferrer reaches the bottom of its stroke it is suddenly revrsed and raised to clear the shuttle when the lay starts back. lVhen the transterrer arm is reversed, the lever 40. because of the inertia due to its movement, will continue to move down against the action of spring 43 to cause detector 46 to penetrate the yarn. After the lever 1-0 comes to-rest the weight will tend tocontinue its movement, due to its inertia, et-zcrting a force tending to move the detector 49 about pivot 51.

lVhen there is sutiicicnt yarn on the bobbin B for continued weaving the parts will move from the position shown in Fig. 2 to that shown in Fig. 3 and the teeth of the detector 4:9 will enter the yarn on the bobbin nd he held against motion about pivot--5.,. -When insutlicient we'tt is present, however, the point- JS of the detector L6 will engage the bobbin B before the teeth of the detector 19 engage the yarn and as the transferrer descends the weight will move said detector 49 to the position indicated in Fig. l, eX panding the light spring 56. As said detector s drigs it will engage and lift the latch to release the plunger 23 and the spring 24: will move said plunger to the position indicated in Fig. :l', a positionwhioh corresponds to indication of wett exhaustion.

From the foregoing it will be seen that I have provided a wet't detector comprising two yarn ing members mounted on a regularly moving transterrer and having one of the detectors provided with a weight so arranged that the inertia thereof will give the detector its indicating movement; Also, the entrance of the end 48 as well as the teeth of detector ett) into the yarn is dependent upon the inertia of the moving parts.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing "from the spirit and scope of the invention, and I do not wish to be limited to the details herein disclosed but what I claim is:

1. In a. we'tt detector for looms, a yarn penetrating detector, a pivoted yarn impinging detector to cooperate therewith, a common support for said detectors movable in a direction toward and trom the surface to be detected, means to cause relative movement between the support for said detectors and the surface to be detected, a weight operatively associated with the pivoted detector, and means to arrest relative motion of the detectors toward, the surface. to be detected, the weight tending to move after the relative motion has been arrested to exert a force on the impinging detector tending to move the latter about the pivot thereof.

In a \vett detector for looms having a ,wet't surface to be detected, a yarn penetrating detector, a yarn impinging detectormovable relatively thereto, means to present said detectors. as a unitto the surface to be detected, means to arrest movement of said de-- teeters as a unit as they approach. the suitface to be detected, and a weightedmember operatively connected to the second named detector and movable therewith towardthe surface to be detected and efiective by the inertia thereof to exert a force tending to move the impinging detector as said detectors are arrester intheir movement toward the surface to be detected.

In a weft detector for looms having a weft surface to be detected, ayarn penetrating detector, :1 yarnimpinging detector movable relatively thereto, means to cause relative movement betweenthe detectors as a unit and the surface to be detected, means to arrest relative movement of the detectors and the surface, and a weighted member operatively connected to the movable detector and movable therewith and tending by the inertia thereof to exert a force on the second named detector tending to move the same when relative movement between said detectors and the surface has been arrested.

4. In a weft detector for looms having a regularly moving transferrer arm, a pair of detectors supported by the transferrer arm and movable with respect thereto, one of said detectors penetrating the yarn and the other of said detectors being movable relatively to the penetrating detector and roughened to engage and be restrained against movement in the direction of the length of the bobbin by the yarn, a weight for the second named detector, said weight tending tocontinue in motion after the transferrer arm comes to rest to give the second named detector an indicating movement.

5. In a weft detector for looms, a transferrer arm, means to give the transferrer arm a downward motion toward the bobbin, a lever pivoted to the transferrer arm and yieldingly held-in raised position, a yarn penetrating detector mounted on the lever,

a yarn impinging detector pivoted on the lever, and arweight operatively connected to the yarn impinging detector, said lever and weight moving downwardly with the transferrer arm, the lever being arrested by engagement of the yarn by the penetrating detector and the weight tending to move after the lever has come to rest to give the impinging detector a movement about the pivot thereof as the transferrer arm comes to rest. 6. In a weft detector for looms, a transferrer arm, means to move the transferrer arm toward the bobbin on each detecting beat of the loom and to arrest movement thereof as the same approaches the bobbin, a member supported by and movable on the transferrer arm in the direction in which the latter moves when approaching the bobbin, a yarn penetrating detector on the mem her, a yarn impinging detector pivoted on the member, yielding means holding the impinging detector in normal position, and a weight operatively associated with the pivoted detector, said weight tendingto continue in motion by the inertia thereof after the movement of the transferrer arm toward the bobbin has been arrested, said continuance of motion on the part of the weight tending to move the impinging detector.

angularly.

7. In a weft detector for looms, a transferrer arm, means to move the transferrer arm toward the bobbin and to arrest movement of saidarm as the latter approaches a bobbin, a member movable with respect to the arm in a direction toward the bobbin and supported by said transferrer arm, yielding means to hold said member away from the bobbin, a pair of, detectors mounted on the member, one yarn penetrating and the other yarn impinging, yielding means to hold the impinging detector in yarn engaging position, a weight-operatively connected to the impinging detector, and a pivotal support for the impinging detector, the weight tending to continue to move after the yarn penetrating detector has arrested motion of the member to give said yarn impinging detector an angular movement about the pivot thereof. 7

' 8. In a weft detector for looms, a transferrer arm, means to move the same toward and from the surface to be detected, a lever pivoted on the arm and movable with respect to the latter toward and from the surface to be detected, resilient means interposed between the lever and the arm to hold said lever away from the surface to be detected, a yarn penetrating detector secured to the lever, a yarn impinging detector pivoted to the lever, yielding means interposed between the impinging detector and the lever to hold said impinging detector in normal position, and a weight operatively connected to the impinging detector, said weight extending in a direction from the pivot of the impinging detector substantially at right angles to the movement of the transferrer arm toward the surface to be detected and tending to move after the transferrer arm has, been brought to rest to exert a force on the impinging detector tending to move the same about the pivot thereof.

In testimony whereof I have hereunto affixed my signature.

AUGUSTIN J. CHEVRETTE. 

